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Label Changes For Implant Use Are Coming In June
South Dakota Ag Connection - 05/25/2023

The new guidance from the FDA’s Center for Veterinary Medicine redefines beef cattle's production phases, which will affect the label claims of existing and new drugs.

“This affects implants for beef cattle production because they are considered a drug,” says Zac Carlson, North Dakota State University Extension beef cattle specialist.

The new production phases are:

1. Calves nursing their dams less than 2 months of age.

2. Calves nursing their dams 2 months of age or older.

3. Growing beef steers/heifers on pasture (stockers).

4. Growing beef steers/heifers in a dry lot (backgrounders).

5a. Growing beef steers/heifers fed in confinement for harvest (feedlot cattle).

5b. Growing beef steers/heifers in a grow yard.

“These production phases are important because the new guidance will allow beef cattle to receive one implant for each production phase,” says Dr. Gerald Stokka, NDSU Extension veterinarian and livestock stewardship specialist. “Additionally, beef cattle will be allowed to receive more than one implant within a production phase, but only if that implant has a claim for reimplantation on the label.”

Currently, there are implants approved for reimplant use within a production phase. However, most implants do not have any language on their label addressing reimplantation.

Production phase 4 (growing beef steers/heifers in a dry lot) is a new production phase, says Karl Hoppe, NDSU Extension livestock systems specialist. It consists of weaned, growing beef steers and beef and dairy heifers that are maintained in a dry lot and receive the majority of their diet from harvested forage, possibly with a supplement. Because this will be a new production phase, no current implants are approved.


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